The reason I think the sensor might be bad is because my printer won't print. I've alrdy made sure the nozzle isn't blocked and the steppermotor is good but it's like its just not heating up. I am taking the temperature right on the brass block the ultimaker 2 has and am only getting about half of what it should be even if I account for a little error from my IR gun it's should be that far off as I've used it before and gotten good results. Could the sensor be bad and still giving me a reading just not a good one? Should I order a new sensor?